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c84a0748c4
issue: #38399 - Embed the query node into streaming node to make delegator available at streaming node. - The embedded query node has a special server label `QUERYNODE_STREAMING-EMBEDDED`. - Change the balance strategy to make the channel assigned to streaming node as much as possible. Signed-off-by: chyezh <chyezh@outlook.com>
34 lines
1.1 KiB
Go
34 lines
1.1 KiB
Go
package balancer
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import (
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"context"
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"github.com/cockroachdb/errors"
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"github.com/milvus-io/milvus/pkg/streaming/util/types"
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"github.com/milvus-io/milvus/pkg/util/typeutil"
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)
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var (
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_ Balancer = (*balancerImpl)(nil)
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ErrBalancerClosed = errors.New("balancer is closed")
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)
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// Balancer is a load balancer to balance the load of log node.
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// Given the balance result to assign or remove channels to corresponding log node.
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// Balancer is a local component, it should promise all channel can be assigned, and reach the final consistency.
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// Balancer should be thread safe.
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type Balancer interface {
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// WatchChannelAssignments watches the balance result.
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WatchChannelAssignments(ctx context.Context, cb func(version typeutil.VersionInt64Pair, relations []types.PChannelInfoAssigned) error) error
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// MarkAsAvailable marks the pchannels as available, and trigger a rebalance.
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MarkAsUnavailable(ctx context.Context, pChannels []types.PChannelInfo) error
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// Trigger is a hint to trigger a balance.
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Trigger(ctx context.Context) error
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// Close close the balancer.
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Close()
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}
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